package com.atguigu.gulimall.product.service.impl;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {

    @Autowired
    //private BaseMapper baseMapper;
    private CategoryDao categoryDao;


    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public List<CategoryEntity> listWithTree() {

        List<CategoryEntity> list = baseMapper.selectList(null);
        List<CategoryEntity> levle1 = list.stream().filter((item) -> {
            return item.getCatLevel() == 1;
        }).map((menu) -> {
            menu.setChildren(getChildrenMenus(menu, list));
            return menu;
        }).sorted((menu1, menu2) -> {
            return (menu1.getSort() == null ? 0:menu1.getSort() ) - (menu2.getSort() == null ? 0:menu2.getSort() );
        }).collect(Collectors.toList());


        return levle1;
    }

    private List<CategoryEntity> getChildrenMenus(CategoryEntity categoryEntity, List<CategoryEntity> list) {

        List<CategoryEntity> children = list.stream().filter((item) -> {
            return item.getParentCid() == categoryEntity.getCatId();
        }).map((menu) -> {
            menu.setChildren(getChildrenMenus(menu, list));
            return menu;
        }).sorted((menu1, menu2) -> {
            return (menu1.getSort() == null ? 0:menu1.getSort() ) - (menu2.getSort() == null ? 0:menu2.getSort() );
        }).collect(Collectors.toList());
        return children;
    }


}